79 lines
2.8 KiB
Lua
79 lines
2.8 KiB
Lua
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---------------------------------------------------------------------------
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-- @author Julien Danjou <julien@danjou.info>
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-- @copyright 2009 Julien Danjou
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-- @release v3.4.10
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---------------------------------------------------------------------------
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-- Grab environment we need
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local setmetatable = setmetatable
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local ipairs = ipairs
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local capi = { key = key }
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local util = require("awful.util")
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--- Create easily new key objects ignoring certain modifiers.
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module("awful.key")
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--- Modifiers to ignore.
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-- By default this is initialized as { "Lock", "Mod2" }
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-- so the Caps Lock or Num Lock modifier are not taking into account by awesome
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-- when pressing keys.
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-- @name ignore_modifiers
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-- @class table
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ignore_modifiers = { "Lock", "Mod2" }
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--- Create a new key to use as binding.
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-- This function is useful to create several keys from one, because it will use
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-- the ignore_modifier variable to create more key with or without the ignored
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-- modifiers activated.
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-- For example if you want to ignore CapsLock in your keybinding (which is
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-- ignored by default by this function), creating key binding with this function
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-- will return 2 key objects: one with CapsLock on, and the other one with
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-- CapsLock off.
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-- @see capi.key
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-- @return A table with one or several key objects.
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function new(mod, key, press, release)
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local ret = {}
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local subsets = util.subsets(ignore_modifiers)
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for _, set in ipairs(subsets) do
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ret[#ret + 1] = capi.key({ modifiers = util.table.join(mod, set),
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key = key })
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if press then
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ret[#ret]:add_signal("press", function(kobj, ...) press(...) end)
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end
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if release then
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ret[#ret]:add_signal("release", function(kobj, ...) release(...) end)
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end
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end
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return ret
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end
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--- Compare a key object with modifiers and key.
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-- @param key The key object.
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-- @param pressed_mod The modifiers to compare with.
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-- @param pressed_key The key to compare with.
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function match(key, pressed_mod, pressed_key)
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-- First, compare key.
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if pressed_key ~= key.key then return false end
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-- Then, compare mod
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local mod = key.modifiers
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-- For each modifier of the key object, check that the modifier has been
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-- pressed.
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for _, m in ipairs(mod) do
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-- Has it been pressed?
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if not util.table.hasitem(pressed_mod, m) then
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-- No, so this is failure!
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return false
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end
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end
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-- If the number of pressed modifier is ~=, it is probably >, so this is not
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-- the same, return false.
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if #pressed_mod ~= #mod then
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return false
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end
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return true
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end
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setmetatable(_M, { __call = function(_, ...) return new(...) end })
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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